Mulit-functional strength training machine --- This arm trainer is different from a traditional arm workout bar in that it stimulates more muscle groups, including chest exercises, wrist exercises, arms, back, legs, and shoulders. You can get a stronger body just by following the standard instructions. The twister arm trainer is simpler and safer, making it the right choice for home gymsUnique full upper body fitness equipment --- Twister Arm Trainer as your personal workout trainer and helping you get a killer chest workout, Through the training guide chart. Twister arm trainer work multiple muscle groups with precision, including chest, arms, biceps, abs, shoulders and back, and thigh musclesErgonomic Design for Safety and Comfort --- Twisted Arm Trainer is designed with your safety and comfort in mind. The leather-wrapped metal protects you from injury, while the padded non-slip foam handles ensure a secure and comfortable grip, even during intense workoutsQuality material --- Chest and Arm Trainer - High strength metal spring, strong elasticity, durability and stability. Exercise is smooth without stalling. The outer leather covers the metal to prevent sports injury. The handle is made of thickened anti-slip foam, which is both anti-slip and comfortable. Three strength levels to choose, to meet different exercise needsEfficient & Portable Exercise --- Whether you are a beginner or a professional athlete, Twister Arm Trainer can help you with strength trainingsimple and practical. It's detachable, doesn't take up space, and you can use it to keep your muscles up when you're outdoors, traveling, in the office, or at home. It's a great addition to your gym. 10 min/time, 4 times/week, will give you perfect muscles